The Red Rock Sound Ivoks Electromusical Synthesizer designed in the style of the Soviet synthesizer 1980s.

On the centre panel is located two audio-frequency oscillators. OSC1 offers frequency Band regulator (9), five Waveforms (10) and controls for LFO Modulation level (11) plus OSC2 Cross-modulation (12). OSC2 offers the same frequency Band (13) and Waveforms (14), an independent control for Modulation depth (15), plus Detuning (16). Underneath these located the mixer, which offers level controls for the two Oscillators (17)(18), the Noise generator (19), and for audio injected into the External signal Input (20).

To the right of these, located the filter (VCF) block. The top half is a standard ADSR (21)(23)(24)(25) envelope — until you flip the switch "ADSR mode" (22), when it becomes a repeating AD-envelope instead. The four controls at the bottom adjust Cut-off (26), Resonance (27), LPF to BPF (28) switch, LFO Modulation level (29) and Envelope level (30).

Next after the filter is the amplifier (VCA) block, it also has ADSR (31)(32)(33)(34) envelope along with another LFO Modulation level (36) and Velocity sensitivity (37) control. Again, the envelope can be switched to a Repeating Mode (35) that generates a triangular waveform determined by the Attack and Decay settings, providing some of the instrument’s most distinctive effects.

The leftmost panels house the LFO controls (top), Mode (2) which offers four waveforms, including noise, and a stepped Function for sample & hold (S&H) effects, well as Speed (1) control. And global settings such as the master Tune (4), master Volume (7), Legato mode (5), Monophonic and Duophonic operation (6) and Unison (8) switches, and the Glide (3) control.